
package com.ess.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**后台运维管理用户密码加密util*/
public class EncryptUtils {
	private static final char[] hexDigits = { '0', '1', '2', '3', '4', '5',
			'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

	public static final String MD5Encrypt(String s)
			throws NoSuchAlgorithmException {
		byte[] btInput = s.getBytes();
		MessageDigest mdInst = MessageDigest.getInstance("MD5");
		mdInst.update(btInput);
		byte[] md = mdInst.digest();
		int j = md.length;
		char[] str = new char[j * 2];
		int k = 0;
		for (int i = 0; i < j; ++i) {
			byte byte0 = md[i];
			str[(k++)] = hexDigits[(byte0 >>> 4 & 0xF)];
			str[(k++)] = hexDigits[(byte0 & 0xF)];
		}
		return new String(str);
	}
}